Laboratory Performance Evaluation of HMA Modified with Various Types and Contents of Polymer

Table 1

Asphalt binder test results for Superpave grade.

Sample ID	KS	K1	K2	K4
SBS type	—	KTR-101	KTR-201	KTR-401H
SBS content (%)	0	3	3.5	3
Performance grade	PG70-22	PG76-22	PG76-22	PG76-22
Original binder
Viscosity (cps, 135°C)	612	2,300	1,800	2,200
(Pa, 70°C)	1,100	4,100	4,400	9,200
(Pa, 76°C)	500	2,100	2,200	4,900
RTFO
(Pa, 70°C)	2,900	9,700	11,200	17,300
(Pa, 76°C)	1,400	5,400	6,100	9,000
PAV
(kPa, 28°C)	2,200	1,300	2,000	3,300
Stiffness (MPa, −12°C)	142	143	149	144
m-value (−12°C)	0.32	0.32	0.34	0.31